Steel for Life: ArcelorMittal

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Steel for Life: Headline Sponsor
Innovation key to progress
ArcelorMittal has been at the forefront of steel manufacturing technology developments
since 1911 when Arbed, one of its constituents, rolled the world’s first one metre deep
universal beam.
10 NSC
June 17
The ambition to stay at the
forefront of developments in steel
manufacturing has been maintained
through the years since 1902 when
ArcelorMittal rolled its first universal beam,
developing into today’s multinational steel
manufacturing force, standing just outside
the top 100 of the world’s biggest companies
as ranked in the Fortune Global 500.
Recent developments include the launch
of its Orange Book design tool, and the
company is also promoting high grade S460
steel and its innovative HISTAR® range in
the UK market. The company says being able
to manufacture larger and heavier sections
enables engineers to cater for the changing
and demanding requirements of their clients.
“Innovation and research and
development remain a fundamental part of
ArcelorMittal’s DNA,” says the company’s
Neil Tilley. “Recently we have promoted the
benefits of high grade steels that we have
developed and made available to the UK
market, where engineers are increasingly
taking advantage of the benefits. Using high
grade steels designers are able to reduce the
weight of steel used in a structure or reduce
column sizes in buildings to produce more
usable space.”
Super Jumbo Sections are now used
extensively in the UK market with column
sizes up to 356 × 406 × 1299 and beams
up to 1138 mm depth. The combination
of strength and size offer gives designers
more choice, whether designing tall slender
skyscrapers or long-span roofs and bridges.
Another benefit is the low carbon equivalent
value (CEV) of HISTAR® steels, exhibiting
toughness at low temperatures and increased
weldability, allowing easier processing
through fabrication workshops.
Mr Tilley said: “Designing in high
strength steel chimes with today’s
sustainability imperatives to do more with
less weight. Cost savings of as much as 20%
are being achieved by using high strength
steels.”
ArcelorMittal’s HISTAR® range allows
designers to utilise the full yield throughout
the thickness range for HISTAR®355 and
for HISTAR®460, dropping marginally to
450N/mm2 only at thicknesses over 100mm.
Cost-effective production of HISTAR® is
made possible by the innovative“in line”
Quenching and Self-Tempering (QST)
process, developed by ArcelorMittal Europe
- Long Products in cooperation with the
Centre de Recherches Métallurgiques in
Liège. HISTAR® steels are delivered in
accordance with the European Technical
Approval ETA-10/156.
Figure 1 (above) shows a comparison,
based on yield strength, between HISTAR®
and other standard structural steel grades.
HISTAR® grades are compatible with the
requirements of the Eurocodes for the design
of steel structures and composite steelconcrete
structures.
Weathering Steel Rolled Sections
ArcelorMittal also reports growing interest in
weathering steel for exposed steel structures
and bridges, where safety considerations for
access and maintenance of protective systems
is a consideration.
The company produces rolled sections
in its Arcorox® weathering steel grade to
EN 10025-5 in grades S355 J0W, J2W and
K2W. Initial oxidation of Arcorox® forms a
natural, tightly adherent, protective oxide
layer (patina) which greatly reduces further
oxidation and negates the need for a further
protective system.
AngelinaTM Beams
ArcelorMittal lays claim to an innovative
and novel approach to service integration
and long span composite beams that
has resulted in the development of the
AngelinaTM beam. Based on a sinusoidal
web cut, AngelinaTM beams produce no
waste from the cell formation and can
accommodate single web openings for both
circular and rectangular services. By varying
the input to the sinusoidal equation, cells
can be sized and positioned for greatest
economy and efficiency, see Figure 2 below.
Pre-design software for AngelinaTM beams
can be downloaded from http://sections.
arcelormittal.com/download-center/designsoftware/
castellated-beam-solutions.html
Figure 2. Geometric limits of the AngelinaTM beam
openings.
Neil Tilley concludes: “The advantages of
our wide range of sections and high grade
steels are becoming more popular with
engineers. Recent work and collaboration
with the Steel Construction Institute (SCI)
AngelinaTM beams in
use for construction
Figure 1: Comparison of yield strength between
HISTAR and other structural steel grades
ArcelorMittal supports
designers with an extensive
range of free pre-design
software and design
guidance, all available from
http://sections.arcelormittal.
com.